Pterygium Inversum Unguis. Presented by Lynn Drake, MD.A 31-year-old woman first noticed an abnormal fingernail growth pattern on the third and fourth digits of her right hand 18 months prior to consultation. Subsequently, the same digits on the left hand became involved, and now the fifth digits of both hands are becoming affected (Fig 1). There is no pain, unless she attempts to clip or file the nails. The fingernail growth rate appears to be normal, and the toenails are not involved. The hyponychium of the involved digits appears to be more adherent to the ventral surface of the nail plate than is normal, and the nail grooves are absent distally. Fungal cultures were negative.

DiscussionDr T. B. Goodman: Since the report in the Archives of Dermatology (108:817, 1973), I have found two asymptomatic cases in women, both of whom were unaware of the nature or onset of